In a press conference this morning, Mayor Vince Gray said the numerous shootings that occurred in the District last night were of “great concern” and said it was “especially disturbing” that the shootings involved teenagers.

The shootings took place in five of the city’s seven police districts, yielding six victims. The most serious shooting took place at 11 p.m. in Georgetown, where a 17-year-old Southeast resident was shot during the neighborhood’s traditional Halloween celebration. Metropolitan Police Department Chief Cathy Lanier said that one arrest had been made in connection to that shooting; a 24-year-old has been charged with carrying a pistol without a license. (Neither Lanier nor Gray discussed the connection between the Georgetown shooting and a brawl which broke out at the Foggy Bottom Metro station shortly thereafter.)

Lanier said that they had little information about the other shootings, but that police were on the lookout for a green SUV that may have been involved in the evening’s first shooting on Florida Avenue where a 16-year-old was struck. Two subsequent shootings — one on Georgia Avenue and Decatur Street NW, the other on 9th and Crittenden Streets NW — are thought to be linked to the first.

Speaking to the press, Lanier said that in her 21 years of policing in the District, October has always been a challenging month for shootings and homicides. She said that the colder weather and bulky clothing makes concealing handguns easier. There were 13 homicides in October 2010, and the same amount in October 2011.